diff --git a/README.md b/README.md
index d8dfb8dd..5b42b175 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,9 @@ Create a ```config.json``` with e.g. the following contents: (all fields are opt
     "file":"Input-Regular_(InputMono-Medium).ttf",
     "size":16,
   },
+  "rendering":{
+    "fftSmoothFactor": 0.9, // 0.0 means there's no smoothing at all, 1.0 means the FFT is completely smoothed flat
+  },
   "textures":{ /* the keys below will become the shader variable names */
     "texChecker":"textures/checker.png",
     "texNoise":"textures/noise.png",
diff --git a/main.cpp b/main.cpp
index 922c16c9..f16f1359 100644
--- a/main.cpp
+++ b/main.cpp
@@ -81,7 +81,7 @@ int main()
 
   int nDebugOutputHeight = 200;
   int nTexPreviewWidth = 64;
-  float fFFTSmoothingFactor = 0.9f;
+  float fFFTSmoothingFactor = 0.9f; // higher value, smoother FFT
 
   char szConfig[65535];
   FILE * fConf = fopen("config.json","rb");
@@ -94,6 +94,12 @@ int main()
     jsonxx::Object o;
     o.parse( szConfig );
 
+    if (o.has<jsonxx::Object>("rendering"))
+    {
+      if (o.get<jsonxx::Object>("rendering").has<jsonxx::Number>("fftSmoothFactor"))
+        fFFTSmoothingFactor = o.get<jsonxx::Object>("rendering").get<jsonxx::Number>("fftSmoothFactor");
+    }
+
     if (o.has<jsonxx::Object>("textures"))
     {
       printf("Loading textures...\n");